Spring suspension device for window-sashes.



H. E. CAMPBELL.

SPRING SUSPENSION DEVICE FOR WINDOW SASHES. APPLICATION FILED 'MAY I.l9l6. I 1,1 91,662. Patented July 18, 191

2 SHEETSSHEET 1.

H. E. CAMPBELL. SPRING SUSPENSION DEVICE FOR WINDOW-SASHES.

APPLICATION FILED HAY I, 1916.

Patented July 18, 1916.

2 SHEETS-SHEET 2- V is HARRY E. CAMPBELL, OF NEW YORK, N. Y.

SPRING SUSPENSION DEVICE FOR WINDOW-SASHES.

Specification of Letters Patent. Patented July 18, 1916.

Application filed May 1, 1916. Serial in. 94,566.

support 19, which supports receive the ends of shafts 20, of polygonalcross section. Said shaft ends are secured in said supports To all whomit may concern:

Be it known that I, HARRY E. CAMPBELL, a citizen of the United States,residing at '15 y for each sash New York, in the county of. New York andState of New York, have invented a certain new and useful Improvement inSpring Suspension Devices for Window-Sashes, of which the following is aspecification.

The invention is a spring suspension de- 10 vice for window sashes whichwill counterbalance a sash of any weight within practical limits.

Hitherto it has been the practice to construct a spring of definite andfixed resili of given weight. In m device the suspension springs are allalike, and the user by the means set forth initially and once for alladjusts each spring to counterbalance the weight of the-sash go which itis to carry.

My suspension device is preferably arranged in a box lintel, and withsaid lintel may be supplied to the nzarket asa unitary structure. Inpractice, a builder, for example, may order as many frames as he needs,

including the suspension devices, without regard to the difierences'inthe weights of the sashes, knowing that he can adjust said suspensiondevices to counterbalance whatso ever differences may exist in sa d weihts. In the accompanying drawingsigure 1 is a vertical section throughthe lintel, one

of the jambs, the sashes and thesilloi the frame on the line 1, 1 .ofFig. 3:. Fig.2

:5 is a vertical section of the lintel andupper portion 'of one of thejambs, and of the upper sash, on the line 2, 2 ofFig. 3. Fig.

3 is a horizontal section on' the line ,3, 3

. of Fig. 2. Fig. 4 is a horizontal'section of the lintel on t e line 4,4 of Fig.- 2

is a vertical section on the line 5 ,5 of Fig.

4, the ratchet disk being 1 removed. Fig.

6 is a vertical section onthe line' 6, -6 of S' ilar letters and numbersof reference indicate like parts.

The frame includes a box-'shape'i'lintel 9, hollow jambs 10 and 11, thelinteliand sill being connected. by bolts 12;. Within the frame are theupper and" lower sliding sashes 13, 14. Eac sash is suspended by twocords, tapes or ,chains' 15, secured to flanged drums 16, 17. I On theouter side of each drum is a journal having its'bearing in It a concaveblock 18 within the lintel 9. On

the inner side of each drum is a V-shaped Fig. 15

"to a collar J fixed" on helical spring K is similarly combined with Hby covers 21 and stirrups '22- which pass under said supports. The armsof said stirrups extend through openings in said covers and receive nutson their threaded ends. This arrangement of polygonal suspension shaftsecured tosupports ournaled 1n the lintel is substantially the same asset fOl'lll in U. S. Patent No. 1,171,168, granted to me February 8th,1916.

Secured to the top wall of the lintel in any suitable-way, or, ifdesired, formed integral therewith, is a cross bar 23, Fig.6, havingthree downwardly depending legs 24, 25, 26. Between the legs 24, 25 isdisposed a ring A, Fig. 5, and between the legs 25, 26 is a similar ringB. .Secured on the ring A and on opposite'sides of thelegs 24, 25 areratchet disks C, D. Secured on the ring 13 and on opposite sides .ofthelegs 25, 26 are similar ratchet disks E, F. The i rings A, B areretained between the legs 24, 25, 26 by a bar 27secured to the lower endof leg 25 and extending below said rings. On one side of bar 23 ispivoted a ,pawl G which engages. with the' ratchet teeth on disk E, andon the other side of bar 2 3 is pivoted a pawl H, dotted lines Fig.

. 5', which engages with the ratchet teeth on disk D. v flhe polygonalshafts 20, 20* pass through the circular openings in rings A, B, asshown the isks, so' that said-d1sks-and'rings are not one 'end extendingthrough an vopening in disk C and secured in ring incloses theshaft 20'and has its opposite "end secured said shaft. A like ring B andcollar Lon shaft 20* At' the time 'the'upper sash 13 is raised into closedposition,-. the spring'K is .in its expanded state, as-shown inFi 2and'4, the suspension cords being wound upon their drums. When thezuppersash 13 is moved downwardly said cords rotate the drums and hence theshaft 20", and because the spring K is attached at one end to the collarL on said shaft and-at the other end'to the ring B, which is preventedfrom rotating by the engagementof pawl G with ratchet disk E, saidspring is wound up and acts as a ot e ax I by said-shafts. A helicalspring I hav'ingi g in E ig; 5, and'tu'rn'freely in said 0 enings, andalso the openings I provide the ratchet disks F counterpoise for theweight of the sash. When the sash 13 is raised to close it, the spring Kexpanding rotates shaft 20*, thus causing the drums to wind up thecords. At the time the lower sash 14 is lowered to closed position, thespring I is in wound up state, as shown in Fig. 4, and counterpoises theweight of the sash, the suspension cords then being unwound from theirdrums 'hen said sash is raised to open it, the spring I expandingrotates the shaft 20 thus causing the drums to wind up the cords.

In order to adapt my spring device to sashes of different Weight, allthat is required is initially to adjust the tension of the'helicalspring to weight of any givensash. For this reason, which, since theyhave no engaging pawls, a Wrench may easily be applied. By rotating thedisk D in direction to cause the teeth of its associated disk C torun-under pawl G, I Wind up and so increase the tension of spring I, andsaid spring in turn rotates 25 shaft'20 and drums 16,17 thereon to causethe cords to pull upwardlyon sash M until the desired-balance isattained.- In similar manner, the disk F is rotated to balance sash 13.'This adjustment of the spring tension need be made but once-for all,when the sashes are put in place in the window-frame.

I claim:

1. A frame, a sash'vertically slidable in said frame, a springsuspension device for said sash comprising a shaft and a, helical springsurrounding the same and connected at its ends respectively to'saidshaft and said frame, independently supported means inclosing androtatable onsaid shaft for adjusting the tension of said spring, andmeans for retaining said last-named means in adjusted position. v

'2; A frame, a shaft journaled in theupper member thereof, a helicalspring surrounding said shaft having one end secured to said frame, asupport on said frame, a ring connected to the other end of said-spring,

said ring being loose on said shaft-and r0:

tatable in said support to adjust the tension of said spring, means forretaining said ring Copies of this patent may be obtained for five centseach, by addressing the suspension counterpoise the said frame, and D,to

disks and ring, one end to one 1,191 ,eea

in adjusted position, a sash vertically slidable in said frame, andsuspension cords connecting said sash to said shaft.

3. A frame, a shaft journaled in the upper member thereof, a fixedsupport on said upper, member, a ring loose on said shaft received androtatable in said support, a ratchet disk fast on said ring, a pawl onsaid support engaging said ratchet disk, a helical spring surroundingsaid shaft having one end secured to said frame and the other endsecured to said disk, winding drums'on said shaft, a sash verticallyslidable in said frame, and suspension cords connected to said drums andsaid sash.

i. A frame, a sash vertically slidable in a support disposed at rightangles to and secured upon the upper member of said frame, a ratchetdisk rotatably secured on said support, a pawl engaging said disk, thesaid disk and support having openings, a. shaft journaled on said upperframe member and passing through said openings, a helical springsurrounding said shaft and connected at and at its opposite on saidshaft, and suspension cords connected to said sash and saiddrums.

5. A frame, comprising a lintel in closed box form, a transversepartition in said lintel having a recess on its under side, a ringinsaid recess, ratchet disks having central openings secured on oppositesides of said ring, means for retaining said ring in said'r'e'cess, apawl on said partition engaging one of said ratchetdisks, a shaftjournaled in said linteland passing through said A a helical springconnected at of said disks and surrounding said shaft and connected atits opposite end; to said shaft, drums on said shaft, a sash-slidable insaid frame, and suspension cords connected to said sash and said drums.In testimony whereof I have affixed my signature in presence of twowitnesses,

HARRY E. CAMPBELL.

l/Vitnesses:

- -GERTRUDE T. PORTER, MAY T. McGARmr.

Gommissioner of Patents,

Washington, 10. 9.

